Pneumatic door-bell



(No Model.) R. P. GARSED.

; w PNEUMATIC DOOR BELL. N0. 282,186. Patqgt lyfi l, 1883.

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NITED" STATES PATENT OFFicE.

ROBERT P. GARSED, or NoRRIsToWN, PENNSYLVANIA.

PNEUMATIC DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 282,186, dated July 31, 1883.

To aZZwhom it may concern:

Be it known that I, ROBERT P. GARSED, a citizen of the United States, and a residentwof N orristown, in the county of Montgomery and State of Pennsylvania, have invented a new and useful Improvement in Pneumatic Door- Bells, of which the following is a specification.

The object of my invention is to furnisha pneumatic door-bell in which one pull of the bell-knob will cause the bell to ring a number of times, and I accomplish this object by the mechanism hereinafter described.

In the accompanying drawings, formingpart of this specification, and in which similar letters of reference indicate like parts throughout the several viewsFigure l is aside elevation of my invention; Fig. 2, a sectional elevation of the air-cylinder, showing the rack for operating the escapement-wheel and the device for guiding it; Fig. 3, a top view of this cylinder; Fig. 4, a plan of the guide or yoke for guiding the rack; Fig. 5, an enlarged side view of the escapement-wheel and its operating mechanism; Fig. 6, a sectional elevation of the same; Fig. 7, an enlarged View of the pump, and Fig. 8 a sectional elevation of the metal hemisphere which holds the pump.

My air-pump A consists of a rubber sphere, around which is a flange or rim, a, which fits into a groove, 6, in the metal hemisphere B, which holds the pump, and which is secured in some suitable manner to the door-frame or other convenient place. The pump is operated by a plunger, 0, which is situated upon one end of a lever, D, the other end of which is hinged and fastened, preferably, to the doorframe but if more convenient, it maybe placed in the cellar and be operated by a wire or chain leading from the bell-pull. pull is fastened to this lever near the hinge, and a small motion of the bell-knob causes the plunger a much larger one. Leading from the hemispherical cup B is a small pipe, E,

through which the a passes to a cylinder, F.

This-cylinder isfurnished with a piston, G, which carries upon it a rack, H, which gears into-a pinion, I, and operates the escapementwheel K.

' It will be seen that the rubber sphere A need have no hole in its outer side for the ingress of air, but may fit loosely within the The bell-.

, Application fi'led October 2, 1882. (No model.)

hemispherical cup, and thus allow the entrance of air around its edges; and when operated up on by the plunger its sides distend and form a perfect joint between said sphere and its holder, preventing the escape of air.

Below and communicating with the cylinder F is asmaller cylinder, L, in which works a When the bell-pull is drawn out, the plunger C is forced into the sphere A, and compresses the air therein and forces it through the pipe E to the cylinder F, raising the piston G and rack H and revolving the escapement-wheel K, and causes the hammer o to give the bell P a number of strokes. When the bell-pull returns to its normal position, (which may be assisted by a spring beneath the lever,) the air in the pipe E and cylinder F is exhausted and the piston G and rack H are drawn down. To allow this" the pinion I is loose upon the shaft R, and upon the wheel K is a pawl, S,

which, when the rack H is moving upward,

catches in the pinion I and causes the wheel K to be revolved; but when the rack is moving downward, the pawl slips and allows the pinion to move without moving. any of the other mechanism.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. The herein-described pump foroperating a pneumatic door-bell, consisting of the rubber sphere A, hemispherical cup B, and plunger O, situated upon a lever, D, said lever being secured to the bell-pull in a manner to cause through the system a ringing of the bell, substantially as set forth.

2. The herein-described device for multiplying the number of strokes of a pneumatic door-bell, and adapted to be operated by the pump A, the cylinder F, furnished with a piston, G, carrying upon one end a rack, H, and upon the other a guide-rod, B, said guiderod working in a second cylinder, L, and said tion of the piston G in its movements, the rack gearing into a pinion, which causes the shaft connected to the wheel K, and the es- 1o ringing of the bell, substantially as set forth. capement mechanism, substantially as set 3*. In a device for operating a pneumatic forth. 5 doorbell, the combination of the plunger 0,

operated by pump A, said plunger consisting Witnesses: of the cylinder F, with piston G, and guide- VICTOR BALIAS,

rod R, adapted to cause a perpendicular m0- CHAS. A. BUTTER.

R. 1 GARSED. 

